172844782845 has 16 divisors (see below), whose sum is σ = 316059031680. Its totient is φ = 79014757824.

The previous prime is 172844782807. The next prime is 172844782849. The reversal of 172844782845 is 548287448271.

It is not a de Polignac number, because 172844782845 - 2¹⁴ = 172844766461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172844782849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823070290 + ... + 823070499.

It is an arithmetic number, because the mean of its divisors is an integer number (19753689480).

Almost surely, 2^172844782845 is an apocalyptic number.

172844782845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172844782845 is a deficient number, since it is larger than the sum of its proper divisors (143214248835).

172844782845 is a wasteful number, since it uses less digits than its factorization.

172844782845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646140804.

The product of its digits is 32112640, while the sum is 60.

The spelling of 172844782845 in words is "one hundred seventy-two billion, eight hundred forty-four million, seven hundred eighty-two thousand, eight hundred forty-five".